Ever wanted to learn something new but have not got the time or money or whatever to attend University. Well, how about doing it all within the confines of your four walls? This is what Academic Earth is. It gives you video recording or lectures from a couple of universities like Harward, MIT, Yale and others. You can either stream the video or download them for later viewing.
I always wanted to do some course in Astronomy and found one on Academic Earth. It is called Introduction to Astrophysics and I have watched the first couple of lectures and have learned more about Astronomy in those lectures than anywhere else. Cannot wait for the rest of the lectures.